216420341 has 4 divisors (see below), whose sum is σ = 216519072. Its totient is φ = 216321612.

The previous prime is 216420313. The next prime is 216420361. The reversal of 216420341 is 143024612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216420341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216420311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46001 + ... + 50486.

It is an arithmetic number, because the mean of its divisors is an integer number (54129768).

Almost surely, 2^216420341 is an apocalyptic number.

It is an amenable number.

216420341 is a deficient number, since it is larger than the sum of its proper divisors (98731).

216420341 is an equidigital number, since it uses as much as digits as its factorization.

216420341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98730.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 216420341 is about 14711.2317975076. The cubic root of 216420341 is about 600.3889524352.

Adding to 216420341 its reverse (143024612), we get a palindrome (359444953).

The spelling of 216420341 in words is "two hundred sixteen million, four hundred twenty thousand, three hundred forty-one".